Limit total size of email

I will start off by saying, we have 10mb limits per attachment for sending and recieving email.  Is there any way to set something up that will stop sending a 3mb file (which by our rule is ok) to 100 people.  

We are using Exchange 2007 email system.

Thanks.
KMNAAsked:
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abelenkiyCommented:
You can put a restriction on people allowed in one send to 100.
But then if someone sends anything with more than 100 will not be able to send.
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pvernocchiCommented:
Or they could send a 9 MB to 99 recipients.

It's a tricky one, there's no solution out of the box. I'd look for some file content filtering at the Antivirus level, perhaps.
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KMNAAuthor Commented:
That is what I was wondering....I know its tricky and never been able to figure it out.    I don't have an issue with One person mailing 150 people as long as it doesn't exceed "said Limit'.  Where the issue comes in to play is trying to train users to use Links instead of Files.   Was just hopeing there was a way to put a 15 MB limit on TOTAL Recipeints so they could not attach 3 MB files and send to even 5 people.
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abelenkiyCommented:
This may be obvious but, the 3 mb email sent to 100 users will be 100 x 3mb connections made. Not 300mb sent at once.
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KMNAAuthor Commented:
In 2007 there is no longer Single Instance storage for Message bodies, but still does for attachments...IF the user mailbox has been moved from a 2k or 2k3 exchange box.  In our case, it has.  So if someone does send out a 3mb attachment to 100 people, we have 300mb going out.  Not sure why Microsoft handled it this way, but they did.
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KMNAAuthor Commented:
Let me rephrase that first second sentence....IF the user mailbox has been moved, this does not do single instance!!
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abelenkiyCommented:
All future messages after a move should still be single instance
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